Improved rail wat-prog



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A.. B.. THOMPSON, OFv OWEGO,ONEW YORK.

Letters .Patent No. 87,124, dated February 23, 1869.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, A. B. THOMPSON, in the town of Owego, county of Tioga, and State of New York, have invented a new and improved Frog for Railway-Tracks; and I do hereby declare that thc following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

In the accompanying drawings- Figure 1 shows the top ofthe frog.

In Figure 2 the frog is inverted, and a thin plate rcmoved, l,to show the moving-parts.

Figureisa .vertical longitudinal section through the line D D, figs. 1 and 2.

The principal part or body of the frog is shown at A, iig. 1, With four elevations thereon, forming the tracks diver-ging from the centre. In the centre itself is a circular opening, in which is a disk or plate, With a single section of track raised thereon. This disk rotates like a turn-table, to bring the rail upon it in connection with the track on which a train is approaching.

In the xed tracks,fon the ends.oi` the frog, are slots, (see iig.'1,) in which are pivoted suitable-shaped tappets, d d l d', which descend and terminate in points near the bottom of the frog.

Inside, and near the bottom, are two disks, C C, iigs.

2 and 3, which partially rotate as they are actuated by the tappet's, pivoted in the rails above, the lower points ofthe tappets entering holes near their periphery.

Each of these disks is also provided with a projection pointing toward the centre andeach other, and entering open spaces in the sides of a plate directly under the turn-table, and firmly attached to and moving with it. (See iig. 2.)

These several parts are -so arranged, that when the rail on the turn-table is in position'for cars to pass over, the tappets in the rails on which cars are approachiugare down level with the surface of the rails, while the tappets in the other two rails are elevated above them, in the form of inclines, facing outward. But if the shifting-rail is Wrong, the rst wheel that comes upon the frog strikes the tappet on that side, and presses it down, the point of the tappetin the disk G turns it, while the projection on the disk engages in the plate on the bottom of the turn-table, thus turning it, with its rail, directly in line with the rail Whose tappet has been struck by the'wheel of the coming train.

As the disks C are turned by tappets in one line of rails, ofcourse the opposite sides ofthe disks, turning in an opposite direction, raise the tappets on that side above the rails, ready to be struck, and bring the turntable back when a train must pass on that track.

By reference to iig. 2, it will be seen that .the projections on the disks C C, and the plate in which they operate, are so constructed that the rail is'securely locked in position, and any power applied to the turntable cannot move it unless the disks O 'O are turned, which can only be done by means of the tappets d.

In figs. 2 and 3v will be seen a iat plate or bar, c, the centre of which is directly beneath the centre of the turn-table, and held by a pin. In the ends'of this bar are slots, in which small pins work freely, the pins being fast in the projections on the disks O. When a tappet is struck by a wheel, it turns the disk on that end only, but the pin in that disk swings the bar onits centre, the other end of the bar unlocks the disk it is attached to, moving it round, and both disks are thereby operated at the same time.

What I claim as my invention, and desire to-secure by Letters Patent, is-

' 1. The combination of the turning-disk B, bearing the shifting section of rail, and provided with the locking-notches underneath, and the operating-disks C C, with their locking-projections, Working in the notches ofthe disk B, substantially as herein specified, all being enclosed in a frog-case, A, which limits their movements, and protects them from disarrangement.

2. The combination of the tappets d d d d, disks O G,wl1en constructed and arranged to automaticallyadjust and lock a movable section of rail in a railwayn frog, substantially in the manner herein described.

. AA. B. THOMPSON.

Witnesses: y

S. W. Hmm, A. W. Fox. 

